Improvement in piano-frames



A. D. B. WOLFF.

PIA'NO FRAMES.- No.174,884. Patented March 14, 1876.

UNITED STATES PATENT QFFIGE.

AUGUSTE DESIRE BERNARD WOLFF, OF PARIS, FRANCE.

IMPROVEMENT IN PIANO-FRAMES.

Specification forming partof Letters Patent No. 174,884, dated March 14, 1876; application filed December 23, 1875.

To all whom it may concern Be it known that I, AUGUSTE DESIRE BER- NARD WOLFF, of Paris, France, have invented certain Improvements in Piano-Fortes, of which the following is a specification:

I The object of my invention is to so construct the string-frame of a piano that the tuningpins will be firmly secured, and the tone of the piano consequently maintained; and this 7 object Iattain in the manner which I will now proceed to describe, reference being had to the accompanying drawing, in Which- Figure 1 is a transverse section, showing the mode of fastening the tuning pegs or pins;

holes is driven a peg, b, of hard wood, of corresponding shape, but slightly larger in diameter, so that it may fit perfectly tight, this peg being prevented from any accidental turning by the grooves c d ef, into which project corresponding ribs on the wood. The surface of the wood being trued, a hole is bored into the center of each peg, as usual, for the reception of the tuning-pin C. In order that the wires may have the proper bearing on the agrafl'e-pins, the frame itself ,is bent or inclined, as shown in Fig. 1.

It will be evident that by the above mode of construction the tuning-pins are firmly secured, and not liable to get out of position, and the tones of the wires consequently preserved.

I claim as my invention- The metal frame A, having openings a, grooved longitudinally, and filled with wood, for the reception of the tuning-pins, as set forth.

In testimony whereofI have signed my name to this specification in the presence of two subscribing witnesses.

ALFRED OOINY, Row. M. HOOPER. 

